CN204511480U - A kind of Novel hollow grouted anchor bar with multistage branch - Google Patents

A kind of Novel hollow grouted anchor bar with multistage branch Download PDF

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Publication number
CN204511480U
CN204511480U CN201520120619.6U CN201520120619U CN204511480U CN 204511480 U CN204511480 U CN 204511480U CN 201520120619 U CN201520120619 U CN 201520120619U CN 204511480 U CN204511480 U CN 204511480U
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China
Prior art keywords
rod
anchoring
cone
steel strand
adapter sleeve
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Withdrawn - After Issue
Application number
CN201520120619.6U
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Chinese (zh)
Inventor
郑志涛
徐颖
邵彬彬
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Priority to CN201520120619.6U priority Critical patent/CN204511480U/en
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Publication of CN204511480U publication Critical patent/CN204511480U/en
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Abstract

The utility model discloses a kind of Novel hollow grouted anchor bar with multistage branch, comprise the steel strand body of rod, one end of the steel strand body of rod connects a connecting rod by the first adapter sleeve, the other end connects anchoring section by the second adapter sleeve, the internal diameter of the steel strand body of rod, connecting rod and anchoring section is all consistent, and the steel strand body of rod is by inserting in first and second adapter sleeve in hydraulic extrusion press fashion of extrusion, the surface of connecting rod is provided with external screw thread, and connecting rod is threaded with the first adapter sleeve; The surface of anchoring section is provided with external screw thread, be threaded with the second adapter sleeve, the two ends of the steel strand body of rod are threaded respectively by first and second adapter sleeve and connect anchoring section and connecting rod, make the dismantled and assembled combination of whole anchor pole, to adapt to different length, and compared with existing metallic rod body, the utility model anchor structure is reasonable, construction is simple, and intensity is high simultaneously, and pliability is good, good springiness, makes whole anchor pole in the large deformation rock-soil layers such as soft-rock tunnel, be less likely to occur fracture and destroy.

Description

A kind of Novel hollow grouted anchor bar with multistage branch
Technical field
The utility model relates to ground anchorage and engineering support field, particularly a kind of Novel hollow grouted anchor bar with multistage branch.
Background technology
The interaction of hole wall rock mass power that hollow grouting anchor passes through anchor pole---injecting cement paste---, transfers and improves self-strength and the self-stable ability of Rock And Soil, improve by the stress state of anchoring Rock And Soil to make it stable.Anchor cable adopts the steel strand of flexible to make, have easy for installation, anchorage depth is large, supporting capacity is high and the advantage such as active enforcement country rock, is widely used in supporting under colliery and tunnel shaft.
Anchor cable and anchor pole are combined and can play both advantages, at present adopt steel strand and the integrally welded design of screw-thread steel more, but this design not only increases cost, and reduce the intensity of screw-thread steel and steel strand due to high-temperature soldering, steel strand anchor rod is made not reach predetermined intensity, simultaneously a little than the difference envisioned with the bonding degree of cementing agent.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of Novel hollow grouted anchor bar with multistage branch, and this assembling hollow grouting anchor achieves the detachable of anchor cable anchor pole assembly, facilitates use.
For achieving the above object, the utility model provides following technical scheme: a kind of Novel hollow grouted anchor bar with multistage branch, comprise the steel strand body of rod be combined into by some steel strand close-packed arrays, the steel strand of the described steel strand body of rod adopt prestress wire, the steel strand body of rod is the cylindrical body of rod of hollow, one end of the steel strand body of rod connects a connecting rod by the first adapter sleeve, the other end connects anchoring section by the second adapter sleeve, the end of anchoring section is provided with two steam vents, described first, two adapter sleeves and connecting rod, anchoring section is the cylindrical body of rod of hollow, and first, the internal diameter of two adapter sleeves is consistent with the external diameter of the steel strand body of rod, the steel strand body of rod, the internal diameter of connecting rod and anchoring section is all consistent, and the steel strand body of rod is by inserting in first in hydraulic extrusion press fashion of extrusion, in the hole of two adapter sleeves, steam vent and anchoring section inner space, the surface of described connecting rod is provided with external screw thread, and one end that the hole of the first adapter sleeve is connected with connecting rod is provided with internal thread, and connecting rod is threaded with the first adapter sleeve, the surface of anchoring section is provided with external screw thread, and one end that the hole of the second adapter sleeve is connected with anchoring section is provided with internal thread, and anchoring section is threaded with the second adapter sleeve.
Preferably, connecting rod is threaded a hold-down nut, is provided with backing plate between hold-down nut and the first adapter sleeve, and described backing plate is straw hat shape.
Preferably, anchoring section is provided with of the same size first near end vertically successively near the second adapter sleeve, two, three, four half cone-shaped are protruding, two often adjacent half cone-shaped are protruding is 180 ° at the angle of the projection of anchoring section end face place plane, each half cone-shaped projection is all connected as a single entity with anchoring section, and the protruding cross section semicircular in shape towards steel strand body of rod one end of each half cone-shaped, this half diameter of a circle is greater than the diameter of anchoring section, each half cone-shaped is protruding rounded towards the cross section of anchoring section afterbody, this diameter of a circle is greater than the diameter of anchoring section and is less than the diameter in semicircular cross section.
Preferably, steam vent is positioned on the anchor bar body at anchoring section place, with the second half cone-shaped projection, the 4th half cone-shaped projection about anchoring section axisymmetrical.
Preferably, axis respectively along anchoring section in each half cone-shaped projection evenly arranges three through holes, wherein first and third half cone-shaped projection is connected same longitudinal reinforcement between the line of centres and two through holes of anchoring section axis being parallel, and one end of this longitudinal reinforcement is positioned at the through hole of the first half cone-shaped projection, the other end extends to the 4th half cone-shaped high spot; Described second, four half cone-shaped projections are connected same longitudinal reinforcement between the line of centres and two through holes of anchoring section axis being parallel, and one end of this longitudinal reinforcement is positioned at the through hole of the 4th half cone-shaped projection, the other end extends to the first half cone-shaped high spot; The through hole of longitudinal reinforcement and half cone-shaped projection adopts the mode of spot welding to fix; Described longitudinal reinforcement between two often adjacent half cone-shaped projections is fastening by stirrup, and stirrup and longitudinal reinforcement form longitudinal reinforcement cage.
Preferably, each stirrup and longitudinal reinforcement contact position adopt welding manner to fix, and all weld branch in each contact position, and the bottom of being somebody's turn to do branch is welded with anchoring section.
Preferably, on the surface of the first adapter sleeve, screw thread is socketed a stop grouting plug, and stop grouting plug is round table-like, and length is consistent with the length of the first adapter sleeve, and stop grouting plug does internal thread process.
Adopt technique scheme, the two ends of the steel strand body of rod are threaded respectively by first and second adapter sleeve and connect anchoring section and connecting rod, make the dismantled and assembled combination of whole anchor pole, to adapt to different length, and the steel strand body of rod is formed by prestress wire manufacture, compared with existing metallic rod body, intensity improves greatly, simultaneously good, the good springiness of pliability, makes whole anchor pole in the large deformation rock-soil layers such as soft-rock tunnel, be less likely to occur fracture and destroy, substantially increases the application life of anchor pole.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is position view between the utility model connecting rod, adapter sleeve, the steel strand body of rod;
Fig. 3 is position view between the utility model steel strand body of rod, adapter sleeve, anchoring section;
Fig. 4 is the A-A sectional view of Fig. 1;
Fig. 5 is the B-B sectional view of Fig. 1;
Fig. 6 is the C-C sectional view of Fig. 1;
Wherein, 1. protruding 13. longitudinal reinforcement 14. stirrups 15. of protruding 12. the 4th half cone-shaped of protruding 11. the 3rd half cone-shaped of protruding 10. second half cone-shaped of the steel strand body of rod 2. first adapter sleeve 3. connecting rod 4. second adapter sleeve 5. anchoring section 6. steam vent 7. hold-down nut 8. backing plate 9. first half cone-shaped fall branch 16. stop grouting plug.
Detailed description of the invention
Below in conjunction with accompanying drawing, by the description to embodiment, the utility model is described further:
As shown in Figure 1, the utility model novel fabricated hollow grouting anchor, comprise the steel strand body of rod 1 be combined into by some steel strand close-packed arrays, the steel strand of the steel strand body of rod 1 adopt prestress wire, the circular body of rod of the steel strand body of rod 1 in hollow, one end of the steel strand body of rod 1 connects a connecting rod 3 by the first adapter sleeve 2, the other end connects anchoring section 5 by the second adapter sleeve 4, first, two adapter sleeves 2, 4 and connecting rod 3, anchoring section 5 is the cylindrical body of rod of hollow, and first, two adapter sleeves 2, the internal diameter of 4 is consistent with the external diameter of the steel strand body of rod 1, the steel strand body of rod 1, the internal diameter of connecting rod 3 and anchoring section 5 is all consistent, and the steel strand body of rod 1 is by inserting in first in hydraulic extrusion press fashion of extrusion, two adapter sleeves 2, in the hole of 4, the surface of connecting rod 3 is provided with external screw thread, and one end that the hole of the first adapter sleeve 2 is connected with connecting rod 3 is provided with internal thread, and connecting rod 3 is threaded with the first adapter sleeve 2, the surface of anchoring section 5 is provided with external screw thread, and one end that the hole of the second adapter sleeve 4 is connected with anchoring section 5 is provided with internal thread, and anchoring section 5 is threaded with the second adapter sleeve 4, connecting rod 3 is threaded a hold-down nut 7, backing plate 8 is provided with between hold-down nut 7 and the first adapter sleeve 2, backing plate 8 is in straw hat shape, and the end face of backing plate 8 bossing is plane, anchoring section 5 is provided with of the same size first near end vertically successively near the second adapter sleeve 4, two, three, four half cone-shaped projections 9, 10, 11, 12, two often adjacent half cone-shaped are protruding is 180 ° at the angle of the projection of anchoring section 5 end face place plane, each half cone-shaped projection 9, 10, 11, 12 are all connected as a single entity with anchoring section 5, and the protruding cross section semicircular in shape towards the steel strand body of rod 1 one end of each half cone-shaped, this half diameter of a circle is greater than the diameter of anchoring section 5, each half cone-shaped is protruding rounded towards the cross section of anchoring section 5 afterbody, this diameter of a circle is greater than the diameter of anchoring section 5 and is less than the diameter in semicircular cross section, axis respectively along anchoring section 5 in each half cone-shaped projection evenly arranges three through holes, wherein first, three half cone-shaped projections 9, same longitudinal reinforcement 12 is connected between the line of centres and two through holes of anchoring section 5 axis being parallel on 11, and one end of this longitudinal reinforcement 13 is positioned at the through hole of the first half cone-shaped projection 9, the other end extends to protruding 12 places of the 4th half cone-shaped, the second, four half cone-shaped projections 10,12 are connected same longitudinal reinforcement 13 between the line of centres and two through holes of anchoring section 5 axis being parallel, and one end of this longitudinal reinforcement 13 is positioned at the through hole of the 4th half cone-shaped projection 12, the other end extends to protruding 9 places of the first half cone-shaped, longitudinal reinforcement 13 adopts the mode of spot welding to fix with the through hole of half cone-shaped projection, longitudinal reinforcement 13 between two often adjacent half cone-shaped projections is fastening by stirrup 14, stirrup 14 and longitudinal reinforcement 13 form longitudinal reinforcement cage, each stirrup 14 adopts welding manner to fix with longitudinal reinforcement 13 contact position, and branch 15 is all welded in each contact position, the bottom of being somebody's turn to do branch 15 is welded with anchoring section 5, and the angle fallen between branch 15 and anchor pole is acute angle, and branch 15 free end is towards the side of the steel strand body of rod 1, wherein two half cone-shaped high spots of anchoring section 5 body of rod are respectively equipped with a steam vent 6, steam vent 6 and anchoring section 5 inner space, and steam vent 6 position respectively with the second half cone-shaped projection 10, 4th half cone-shaped projection 12 is relative to the axisymmetrical of anchoring section 5.
Anchoring section 5 of the present utility model and connecting rod 3 adopt high-strength screw-thread steel to make.
The utility model, relative to prior art, has following beneficial effect:
(1), the two ends of the steel strand body of rod 1 connect anchoring section 5 and connecting rod 3 respectively by first and second adapter sleeve 2,4, make the dismantled and assembled combination of whole anchor pole, to adapt to the needs of different length.The steel strand body of rod 1 is formed by prestress wire manufacture, compared with existing metallic rod body, intensity improves greatly, simultaneously good, the good springiness of pliability, make anchor pole in the large deformation rock-soil layers such as soft-rock tunnel, be less likely to occur fracture and destroy, substantially increase the application life of anchor pole; Anchoring section 5 is made up of high-strength screw-thread steel, have above it half cone-shaped projection 9,10,11,12 and fall branch 15, add the contact area of anchor pole and slurries, improve the uplift resistance of anchor pole; Longitudinal reinforcement cage can improve the structural strength of injecting cement paste, extends the application life of anchor pole; Because the angle fallen between branch 15 and anchor pole is acute angle, and branch 15 free end is towards the side of the steel strand body of rod 1, anchor pole is after putting into boring, the branch 15 that falls tightly contacts with drill hole inner wall, branch 15 is made down to hook drill hole inner wall, prevent anchor pole from departing from permanent position, and play the effect of centering, anchor pole is made to be in the centre of boring, thus ensure the uniformity that injecting cement paste contacts with the body of rod, in addition when soft rock supporting multistage fall branch can also provide anchored force immediately, can prevent straight up skyhook time prevent from anchor pole from dropping out hurting sb.'s feelings.
(2) when, the utility model anchor pole uses as detachable anchor, half cone-shaped projection 9,10,11,12 on anchoring section 5, branch 15, arranging of longitudinal reinforcement cage can also ensure anchoring section 5 and the globality of injecting cement paste, is unlikely to make anchoring section 5 owing to disassembling removable section, anchored force be lost efficacy.
(3), insert in first and second adapter sleeve 2,4 in the mode that extruded by hydraulic extrusion press of the steel strand body of rod 1, eliminate complicated welding procedure, easy assembly and disassembly, improve production efficiency, avoid the phenomenon of the quality shakiness occurred in welding; And can random length be cut into due to steel strand, link together with anchoring section 5, meet different anchorage length requirement, in the job site of assembling day by day, arbitrarily can combine between different anchor pole, facilitate site operation.
(4), backing plate 8 adopts the careless hat-shaped structure of intermediate projections, works and plays certain cushioning effect, avoid anchor pole to be pulled off and catastrophic failure together with the steel strand body of rod 1.
Use a kind of construction sequence with the multistage Novel hollow grouted anchor bar of branch of the utility model as follows:
1) preparation machine, after drilling jumbo is in place, connects the water supply of jumbo, for electric line;
2) measure cloth eye, according to Soil Anchor Design spacing and rock mass, the bedding of the soil body and the distribution situation at joint, mark eye position with coating; For bedding, joints development position, should encrypt and lay eye position;
3) hole, get out anchor pole fixing hole with drilling jumbo on the eye position marked, during boring, drilling rod is perpendicular to the bed plane of rock mass or the soil body; The size of bore diameter is relevant with the hardness of Rock And Soil, when ensure bore diameter be greater than tubular type grouted anchor bar diameter be less than on same cross section fall branch formed maximum gauge, bore diameter on rock mass is got greatly, bore diameter on the soil body is got smaller, determine by experiment, be as the criterion to squeeze into anchor pole smoothly;
4) clear hole and inspection, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone; Check whether the hole depth of anchor pole fixing hole meets the demands;
5) squeeze into anchor pole, anchor pole is squeezed into anchor pole fixing hole, until reach projected depth;
6) stop grouting plug is installed, at the afterbody of anchor pole, stop grouting plug 16 is installed, then skyhook backing plate 8 and hold-down nut 7 successively;
7) slip casting, injects cement mortar by slip casting passage; After slip casting, with the injected hole of Anchor Agent timely shutoff connecting rod end.
When the utility model uses as detachable anchor, after reaching the length of time Deng injecting cement paste consolidation, remove hold-down nut 7, backing plate 8, connecting rod 3, stop grouting plug 16, first adapter sleeve 2, the steel strand body of rod 1, second adapter sleeve 4, due to injecting cement paste consolidation, anchoring section cover bonds completely with peripheral rock, and compressive stress is passed to periphery bottom, therefore can excavate the stratum of outer anchor section.
Above-described is only preferred embodiment of the present utility model; it should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.

Claims (7)

1. the Novel hollow grouted anchor bar of the multistage branch of band, comprise the steel strand body of rod (1) be combined into by some steel strand close-packed arrays, the circular body of rod of the steel strand body of rod (1) in hollow, it is characterized in that: the steel strand of the described steel strand body of rod (1) adopt prestress wire, one end of the steel strand body of rod (1) connects a connecting rod (3) by the first adapter sleeve (2), the other end connects anchoring section (5) by the second adapter sleeve (4), the end of anchoring section (5) is provided with two steam vents (6), described first, two adapter sleeves (2, 4) and connecting rod (3), anchoring section (5) is the cylindrical body of rod of hollow, and first, two adapter sleeves (2, 4) internal diameter is consistent with the external diameter of the steel strand body of rod (1), the steel strand body of rod (1), the internal diameter of connecting rod (3) and anchoring section (5) is all consistent, and the steel strand body of rod (1) is by inserting in first in hydraulic extrusion press fashion of extrusion, two adapter sleeves (2, 4) in hole, steam vent (6) and anchoring section (5) inner space, the surface of described connecting rod (3) is provided with external screw thread, and one end that the hole of the first adapter sleeve (2) is connected with connecting rod (3) is provided with internal thread, and connecting rod (3) is threaded with the first adapter sleeve (2), the surface of anchoring section (5) is provided with external screw thread, and one end that the hole of the second adapter sleeve (4) is connected with anchoring section (5) is provided with internal thread, and anchoring section (5) is threaded with the second adapter sleeve (4).
2. a kind of Novel hollow grouted anchor bar with multistage branch according to claim 1, it is characterized in that: described connecting rod (3) is threaded a hold-down nut (7), backing plate (8) is provided with between hold-down nut (7) and the first adapter sleeve (2), described backing plate (8) is in straw hat shape, and the end face of backing plate (8) bossing is plane.
3. a kind of Novel hollow grouted anchor bar with multistage branch according to claim 2, it is characterized in that: described anchoring section (5) is provided with of the same size first near end vertically successively near the second adapter sleeve (4), two, three, four half cone-shaped projections (9, 10, 11, 12), two often adjacent half cone-shaped are protruding is 180 ° at the angle of the projection of anchoring section (5) end face place plane, each half cone-shaped projection (9, 10, 11, 12) be all connected as a single entity with anchoring section (5), and each half cone-shaped projection (9, 10, 11, 12) towards the cross section semicircular in shape of the steel strand body of rod (1) one end, this half diameter of a circle is greater than the diameter of anchoring section (5), each half cone-shaped projection (9, 10, 11, 12) cross section towards anchoring section (5) afterbody is rounded, this diameter of a circle is greater than the diameter of anchoring section (5) and is less than the diameter in semicircular cross section.
4. a kind of Novel hollow grouted anchor bar with multistage branch according to claim 3, it is characterized in that: described steam vent (6) is positioned on the anchor bar body at anchoring section (5) place, with the second half cone-shaped projection (10), the 4th half cone-shaped projection (12) about anchoring section (5) axisymmetrical.
5. a kind of Novel hollow grouted anchor bar with multistage branch according to claim 4, it is characterized in that: described each half cone-shaped projection (9, 10, 11, 12) axis respectively along anchoring section (5) on evenly arranges three through holes, wherein first, three half cone-shaped projections (9, 11) above same longitudinal reinforcement (13) is connected between the line of centres and two through holes of anchoring section (5) axis being parallel, and one end of this longitudinal reinforcement (13) is positioned at the through hole of the first half cone-shaped projection (9), the other end extends to the 4th half cone-shaped projection (12) place, described second, four half cone-shaped projections (10,12) are upper is connected same longitudinal reinforcement (13) between the line of centres and two through holes of anchoring section (5) axis being parallel, and one end of this longitudinal reinforcement (13) is positioned at the through hole of the 4th half cone-shaped projection (12), the other end extends to the first half cone-shaped projection (9) place, longitudinal reinforcement (13) adopts the mode of spot welding to fix with the through hole of half cone-shaped projection (9,10,11,12), described longitudinal reinforcement (13) between two often adjacent half cone-shaped projections is fastening by stirrup (14), and stirrup (14) and longitudinal reinforcement (13) form longitudinal reinforcement cage.
6. a kind of Novel hollow grouted anchor bar with multistage branch according to claim 5, it is characterized in that: described each stirrup (14) and longitudinal reinforcement (13) contact position adopt welding manner to fix, and all weld branch (15) in each contact position, the bottom of being somebody's turn to do branch (15) is welded with anchoring section (5).
7. a kind of Novel hollow grouted anchor bar with multistage branch according to claim 6, it is characterized in that: socket stop grouting plug (16) on the surface of the first adapter sleeve (2), stop grouting plug (16) is in round table-like, and length is consistent with the length of the first adapter sleeve (2).
CN201520120619.6U 2015-02-28 2015-02-28 A kind of Novel hollow grouted anchor bar with multistage branch Withdrawn - After Issue CN204511480U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104674808A (en) * 2015-02-28 2015-06-03 安徽理工大学 Novel assembly type hollow grouting anchor bolt and construction method thereof
CN104612732B (en) * 2015-02-28 2016-06-08 安徽理工大学 A kind of Novel hollow grouted anchor bar with multistage branch
CN107060852A (en) * 2017-01-22 2017-08-18 北京工业大学 A kind of FRP hollow grouting anchoring-bolts of embedded steel strand wires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104674808A (en) * 2015-02-28 2015-06-03 安徽理工大学 Novel assembly type hollow grouting anchor bolt and construction method thereof
CN104612732B (en) * 2015-02-28 2016-06-08 安徽理工大学 A kind of Novel hollow grouted anchor bar with multistage branch
CN107060852A (en) * 2017-01-22 2017-08-18 北京工业大学 A kind of FRP hollow grouting anchoring-bolts of embedded steel strand wires

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AV01 Patent right actively abandoned

Granted publication date: 20150729

Effective date of abandoning: 20160608

C25 Abandonment of patent right or utility model to avoid double patenting